I just bought a used one a few months ago. They are extremely useful and really speed up M/T construction. Is it worth it…probably not; UNLESS you do this to make money. Not only is the tool expensive, but the tenons aren’t all that cheap either. Ditto on the “must have”….if you can write it off on taxes it probably is something to put real high on the shopping list. So why did I buy one? I am a hobbyist and do not fit those categories….well, I did get a fair deal on it and have no other tools on the shopping list. I also have a project coming up where it should be quite useful….
"I long for the day when coke was a cola and a joint was a bad place to be" Merle Haggartd